I need to due a walk though for the below problem, however I barely under stand it myself. The below link shows how the problem should be solved. The easier the steps are to understand the easier it would be for me to understand next time.

Example: https://www.coursehero.com/file/33766339/MAT-140-Milestone-Twodocx/#/doc/qa

cosxsinysin(xy)=tanxcoty1

Remember to:

• Identify the problem statement.
• Correctly use appropriate identities and/or theorems.
• Correctly use the algebraic process.
• Identify the final statement.

Rules:

Defend the validity of your solutions and demonstrate your ability to effectively communicate using precalculus notations, conventions, and terminology.